My chickens have recently began to develop coloration on their combs. At first, I thought it was nothing. I have been reading of potential injuries, and to put Neosporin on them to help with the healing process. I did not think much of it. However, recently, my chicken has began to develop white on her comb as well. Is it infected? My Roo also getting a black comb. What is this, and what should I do? To continue, a different hen has developed a cough. Does it have something to do with the combs on the other two?